Butterfly barb

The butterfly barb (Enteromius hulstaerti) is a species of cyprinid fish in the genus Enteromius.

Size
This species reaches a length of 3.5 cm.

Etymology
The fish is named in honor of Révérend Père Gustaaf Hulstaert (1900-1990), an entomologist, botanist and missionary in the Belgian Congo, who collected the type specimen.